This is an interesting technique that I used in my latest photo, The Explosion. Simply, you zoom the lens as you take the photo, and you get some cool motion blur, no Photoshop required.
Now, there are some concerns that you wouldn’t face with your normal photo, where the focal length stays constant through the exposure. Namely, these are:
• You can’t do it on most compacts, because the zoom is locked while taking the photo, as it’s controlled electronically. Using the method on a DSLR, where you turn the barrel …

